Fix mattermost notifications (#307)

Author: optik-aper

.github/workflows/notify-issue.yml

@@ -9,10 +9,9 @@ jobs:
     runs-on: ubuntu-latest
     name: New Issue Notification
     steps:
-      - run: |
-          echo "{\"text\":\"GoVultr : New Issue https://github.com/vultr/govultr/issues/${{ github.event.issue.number }} \"}" > mattermost.json
       - uses: mattermost/[email protected]
         with:
           MATTERMOST_WEBHOOK_URL: ${{ secrets.MATTERMOST_WEBHOOK_URL }}
           MATTERMOST_USERNAME: ${{ secrets.MATTERMOST_USERNAME}}
-          MATTERMOST_ICON: ${{ secrets.MATTERMOST_ICON }}
+          MATTERMOST_ICON_URL: ${{ secrets.MATTERMOST_ICON }}
+          TEXT: "${{ github.repository }}: New Issue https://github.com/${{ github.repository }}/issues/${{ github.event.issue.number }}"

.github/workflows/notify-pr.yml

@@ -7,10 +7,9 @@ jobs:
     runs-on: ubuntu-latest
     name: Pull Request Notification
     steps:
-      - run: |
-          echo "{\"text\":\"GoVultr : PR https://github.com/vultr/govultr/pull/${{ github.event.number }} \"}" > mattermost.json
       - uses: mattermost/[email protected]
         with:
           MATTERMOST_WEBHOOK_URL: ${{ secrets.MATTERMOST_WEBHOOK_URL }}
           MATTERMOST_USERNAME: ${{ secrets.MATTERMOST_USERNAME}}
-          MATTERMOST_ICON: ${{ secrets.MATTERMOST_ICON }}
+          MATTERMOST_ICON_URL: ${{ secrets.MATTERMOST_ICON }}
+          TEXT: "${{ github.repository }} : PR https://github.com/${{ github.repository }}/pull/${{ github.event.number }}"

.github/workflows/releaser.yml

@@ -69,10 +69,9 @@ jobs:
     needs: ["goreleaser", "create-tag"]
     name: Release Notification
     steps:
-      - run: |
-          echo "{\"text\":\"GoVultr : Release https://github.com/${{ github.repository }}/releases/tag/${{ needs.create-tag.outputs.new_tag }} \"}" > mattermost.json
       - uses: mattermost/[email protected]
         with:
           MATTERMOST_WEBHOOK_URL: ${{ secrets.MATTERMOST_WEBHOOK_URL }}
           MATTERMOST_USERNAME: ${{ secrets.MATTERMOST_USERNAME}}
-          MATTERMOST_ICON: ${{ secrets.MATTERMOST_ICON }}
+          MATTERMOST_ICON_URL: ${{ secrets.MATTERMOST_ICON }}
+          TEXT: "${{ github.repository }} : Release https://github.com/${{ github.repository }}/releases/tag/${{ needs.create-tag.outputs.new_tag }}"